Switch-block.



T.. VE. MURRAY.

SWITQHIBLOGK. APPLICATION FILED SEPT. 9, 1909.

Patented Apr. 26, 1910.

2 SHEETS-SHEET 1.

T. E. MURRAY.

SWITCH BLOCK. APPLICATION FILED SEPT. 9, 1909.

Patented Apnz, 1910.

l cih/we who@ To -aZZ 'whom 'it may UNITED sTATns PATENT OFFICE.

' THOMAS n. MURRAY, or NEW YORK, N. Y.

SWITCH-BLOCK.

Apiiiicanon inea specification of Letters raient. vPatented Apr. 26, 1910.

september 9, i909. serial No. 516,885.

concern:

' Be it known that I, THOMAS E. MURRAY, a citizen ofthe United States, residing at New York, in the county of New York and State of'New York, have invented certain new and useful Improvement in Switch- ]Slocks, ot' which the following is a specification.

"he invention is a switch 'cutout, by

means ot' which a branch circuit, in which cut-outs may be interposed, may be connected at will in any ot' a plurality of parallel main circuits 1n which parallel circuits any desired translating devices may be inserted.

Fig. i .is a sect-ion on the line 4,4, of Fig.

1. Fig. 'is an electrical diagram showing the circuit. connections.

parts.

A is the base block preferably made of porcelain or other refractory insulating niaterial. A

N is a neutral main-conductor received in and extending through a passage P) formed in the block and secured `iii place by the clampin screw C. The conductor N, at its lower e ge, rests upon a metal strip I) received in a recess inthe block, and said strip is connected at its ends by iiicans of the iiisulated screw bolts E with the threaded metal sockets F, G disposed in cylindrical recesses I-I .formed 'in said block. The sockets F, G are of the usual kind adapted to receive fuse plugs not. shown, but indicated diagraininatically in Fig. 5 at ,which, plugs are interposed .in the local circuits X and Y'. In the base block are I, J, in which aredisposed threaded metal sockets K, L, similar to sockets F,

- (not shown) which plugs are to be respec- Similar 'letters of reference indicate likealso two other recesses G, and which also are adapted to receive t'use plugs receiving. reci `es are metal strips M,'Q,.which are bentupward, turned horizontally through sockets by disks t of insulating material. Said passages extend through. the block and are disposed on opposite sides ot' the pas.

sage in which is 'placed the neutral conductor N. The strips M, versely across said passages M being disposed in the passa strip Q, in the passage P. In t Q extend trans- O, P, the strip e Oand the e passage O in the passage P is placed the minus main l conductor S. The conductorsR, S substantially till the passages O, P, except at the is placed the plus'main conductor R, and` portions thereof into which the metal strips M, Q enter. .At said portions, saidpassages are enlarged in area so that a space or i'nterval, Fig. 3, is formed above the conductors R, S and below the strips ductor R is composed of a pluralitypf par allel metal bars a, b, 0, bars f of insulating material. Similarly the conductor S is composed of a plurality of parallel metal bars g, h, z', fi, 1c with .intersed bars mP of insulating material. In

both conductors the insulating bars f, m extend somewhat abovethe metal bars a, b, etc., g, L,'etc., so that a guide channel or groove is thus torined above the upper edge l of each iiietal bar.

` T is a removable switch piece made ofa metal having its lower portion Uhorizontal and ofsuch thickness as to slide easily into any of the grooves above `the metal bais of conductors R, S.

as show-n at n, and is ofsuch vertical height i Said horizontal portion ispreferably split, l

as that when it is inserted in any groove, the armsl formed by the split shallbe closed together, as shownl in Fig. 4, sothat said horizontal portion makes resilient contact l with the metal conducting strip M or Q, above it, and the metal bars a, b, etc. or g,

soldered metal strips u, u which, extend through openings in thev wall of lock A and serve as terminals for the connection oY the local circuit Y. l are soldered similar stripsi), fu', Vwhich extend through openings in the wall of block A and serve as terminals for the connection of the local circuit X. v

In the local circuits may bev interposed the lainp's or other translating devices indicated at w. {,f a switch piece T, as shown in Fig. l, beinserted to establish contact between the-parallel memberY cof posil i i l formed, as described,

To the sockets F, K,

M, The con# d, e with interposed strip.. u, fuse, screw E, platel D, metal bar .N and' line conductor o attached thereto.

`member j by strip Q to screw E to fuse, to

tire conductor and the ystrip M, the circuit will proceed as follows: form member c by strip M to screw E to fuse. a toQsocket K to strip v and so to circuit l X'fto strip fu socket F, fuse, screwE, plate D, neutral bar4 N and line conductor 0 attached t-hereto.

'Obviously other circuits will be formed in tions adjacent thereto and to close circuit like manner, if the removable switch pieces y T, T, are inserted in contact with other i members of the potential conductors. this way I am enabled to bring a branch ycircuit into any one of a number of parallelmain circuits, in which main circuits any desired translating devices may be interposed. l I claim: i 1. The combination of a base block ofi refractory insulating material having transi verse tubular passages, two main circuiti conductors respectively in said passages, one i of said conductors being formed ot' a plucuit conductors on said block, one of said branch conductors extending into said ,passages and crossing said parallel members, A,a removable switch plug constructed tofenter between said extended branch conductor and any one of said parallel members, and means within said block for connecting the other i allel members, a removable switch plug eon- ,f

structed to enter the channel formed above any plate and between the insulating parti between said extended terminal and said plate, andineans for connecting the other of said terminals to the other circuit conductor.

3. The combination of a base block, the main conductors of a three-wire system dis posed in separate passages therein, the main potential conductors each being formed of a plurality oit' parallel members, two pairs oit' branch circuit conductors on said block.r removable means for connecting a branch conductor of one pair to any-one of the positive parallel members, removable means for connecting a branch conductor of the rality of parallel members, two branch cirother pair to any one of the negative parallel members, and means for connecting the remaining branch conductors of both pair to the neutral main conductor.

THOMAS MURRAY. Witnesses:

Gam-Rumi T. PORTER, MAY T. MCGARRY.

(it-r 

